Is it possible to achieve a circuit of Fig.2 of ucc2808 data seat?
The input voltage area which is 72V from 36V by Push - Pull system, can it correspond?
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The push pull can be designed for this wide voltage range.
For example if the output duty cycle is 90% at 36V (corresponding to 45% duty cycle on each gate drive) then the required output duty cycle will be 45% at 72V
(corresponding to 22.5% duty cycle on each gate drive)
Does that make sense? Of course it is always difficult to design a power supply with a wide input range but it is possible to do so with the right care and attention to details